blk_add_trace_rq_issue 1120 kernel/trace/blktrace.c ret = register_trace_block_rq_issue(blk_add_trace_rq_issue, NULL); blk_add_trace_rq_issue 1168 kernel/trace/blktrace.c unregister_trace_block_rq_issue(blk_add_trace_rq_issue, NULL);